From the University of Michigan Medical School (C.P.), the Department of Internal Medicine, University of Michigan Medical School (A.C., S.S., N.H.), the Veterans Affairs Ann Arbor Healthcare System Medicine Service (A.C., S.S., N.H.), and the Department of Veterans Affairs Health Services Research and Development Center of Excellence (S.S.) — all in Ann Arbor; and the Department of Medicine, University of California San Francisco, and the San Francisco Veterans Affairs Medical Center — both in San Francisco (G.D.).

Address reprint requests to Dr. Houchens at the Veterans Affairs Ann Arbor Healthcare System, 2215 Fuller Rd., Mail Code 111, Ann Arbor, MI 48105, or at [email protected].